h2 doesn't start programmatically

问题

I have wrote following code:

  private static void startH2(){
        Server server = null;
        try {
            server = Server.createTcpServer("-tcpAllowOthers").start();
            Class.forName("org.h2.Driver");
            Connection conn = DriverManager.
                    getConnection("jdbc:h2:tcp://localhost/~/test;MODE=PostgreSQL", "sa", "");
        } catch (Exception e) {
            LOG.error("Error while initialize", e);
        }
        System.out.println("finish");
    }
    public static void main(String [] args){
        startH2();
    }

I run my main method and see following situation:

Looks like Server.createTcpServer creates new non daemon thread.

but by url localhost:8082 I don't see h2 web console(actual result - ERR_CONNECTION_REFUSED)

How to fix this?

P.S.

I have noticed that by url

http://localhost:9092/

my browser downlods file with strange content:

if to decode this text I see following message:

Version mismatch, driver version is “0” but server version is “15”

I use h2 version 1.4.182

回答1:

H2 contains multiple servers:

the TCP Server (for H2 JDBC clients),
the Web Server (for browsers, the H2 Console application), and
the PG Server (for PostgreSQL clients).

You have started the TCP Server. If you want to use a browser, you also need to start the Web Server:

private static void startH2(){
    Server tcpServer = null;
    Server webServer = null;
    try {
        tcpServer = Server.createTcpServer("-tcpAllowOthers").start();
        System.out.println("TCP Server Port: " + tcpServer.getPort());
        Class.forName("org.h2.Driver");
        Connection conn = DriverManager.
                getConnection("jdbc:h2:tcp://localhost/~/test22;MODE=PostgreSQL", "sa", "");
        webServer = Server.createWebServer().start();
        System.out.println("Web Server (H2Console) Port: " + webServer.getPort());
    } catch (Exception e) {
        e.printStackTrace();
    }
    System.out.println("finish");
}

来源：https://stackoverflow.com/questions/34318611/h2-doesnt-start-programmatically

标签

java

h2db